Messages in this thread | | | Subject | Re: Slow NFS performance over wireless! | From | Trond Myklebust <> | Date | Mon, 12 Jan 2004 21:15:12 -0500 |
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På må , 12/01/2004 klokka 20:55, skreiv Roman Gaufman: > I have searched all over the nfs, enabled higher caching on nfs, enabled the > usage of tcp, tried to pass hard, but transfer rates very poor, and only for > nfs transfer, so it doesn't seem my network configurations are wrong as scp, > html, ftp seem to work on full speed.
You should definitely enable TCP in this case.
Most likely causes: you may have a problem with echos on your wireless, or you may have a faulty driver for your NIC.
Try looking at 'netstat -s' on both the server and the client. Monitor the number of TCP segments sent out, number retransmitted, and number of segments received on both ends of the connection while doing a set of writes, then do the same for a set of reads.
Also try monitoring the wireless rates (iwlist <interface> rate), and quality of link (iwlist <interface> ap) while this is going on. Note: if your driver doesn't support iwlist, then just typing 'iwconfig <interface>' might also give you these numbers.
Cheers, Trond - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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